Table 1.
Number of active regions (N) with positive and negative axial dipole moments, ratio of number of active regions (R) with opposite-sign axial dipole moments and total number of active regions, total positive and negative axial dipole moment (M, in Gauss), and the ratio of axial dipole moment of opposite sign and the total absolute axial dipole moment (D).
| 21N | 21S | 22N | 22S | 23N | 23S | 24N | 24S | |
|---|---|---|---|---|---|---|---|---|
| Number of active regions | ||||||||
| N, Positive | 195 | 182 | 399 | 441 | 166 | 219 | 286 | 253 |
| N, Positive Hale | 172 | 158 | 379 | 419 | 154 | 201 | 277 | 245 |
| N, Positive anti-Hale | 23 | 24 | 20 | 22 | 12 | 18 | 9 | 8 |
| N, Negative | 406 | 442 | 175 | 162 | 400 | 471 | 114 | 99 |
| N, Negative Hale | 387 | 420 | 156 | 145 | 382 | 450 | 109 | 91 |
| N, Negative anti-Hale | 19 | 22 | 19 | 17 | 18 | 21 | 5 | 8 |
| R, Opposite/total | 0.32 | 0.29 | 0.30 | 0.27 | 0.29 | 0.32 | 0.29 | 0.28 |
| Total moment [G] | ||||||||
| M, Positive | 1.81 | 1.07 | 4.89 | 6.31 | 0.96 | 1.82 | 1.81 | 2.19 |
| M, Positive Hale | 1.06 | 0.82 | 4.50 | 6.10 | 0.90 | 1.62 | 1.69 | 2.08 |
| M, Positive anti-Hale | 0.75 | 0.25 | 0.40 | 0.22 | 0.06 | 0.20 | 0.12 | 0.10 |
| M, Negative | –4.36 | –4.69 | −1.01 | −1.71 | –4.93 | –4.92 | −0.56 | −0.53 |
| M, Negative Hale | –4.14 | –4.57 | −0.79 | −1.51 | –4.70 | –4.70 | −0.48 | −0.47 |
| M, Negative anti-Hale | –0.22 | –0.13 | −0.22 | −0.19 | –0.23 | –0.23 | −0.08 | −0.05 |
| D, Opposite/total | 0.29 | 0.19 | 0.17 | 0.21 | 0.16 | 0.27 | 0.24 | 0.19 |
Notes. Values have been computed separately for northern and southern wings of cycles 21−24, and for active regions with Hale and anti-Hale polarities. Normal polarity is marked in bold.
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